Above rufous-brown, all the feathers broadly centred dark-brown ; rump plain rufous; quills dusky, narrowly edged with brown; tail with the two central feathers pale brown, darker in the middle, and pale tipped; the others all dark-brown, deeper towards the end, and with a broad whitish tip ; plumage beneath rufescent-white, nearly pure white on the chin and throat, and more rufescent on the flanks; tail beneath cinereous at the base, then pale rufous, with a black bar, and a broad white tip, in some uniform dusky-cinereous.

The Rufous Grass Warbler is a common permanent resident in most portions of our limits, and breeds during the monsoon. It makes a long tubular nest, composed of soft white vegetable down, in the centre of a clump of grass, a short distance only from the ground. The eggs, usually five in number, are oval in shape, white or greenish-white in color, thickly speckled with tiny spots of reddish-brown. These spots often show a tendency to form a zone around the larger end.

They measure 0.58 in length by 0.46 in breadth.

BookTitle:

Handbook to the Birds of the Bombay Presidency

Reference:

Barnes, Henry Edwin. Handbook to the birds of the Bombay Presidency, 1885.